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| Country |
Since Date |
Application Date |
Negotiations Date |
Invitation Date |
| Australia |
7 June 1971 |
|
|
|
| Austria |
29 September 1961 |
|
|
|
| Belgium |
13 September 1961 |
|
|
|
| Canada |
10 April 1961 |
|
|
|
| Chile |
7 May 2010 |
November 2003 |
16 May 2007 |
15 December 2009 |
| Colombia |
28 April 2020 |
24 January 2011 |
30 May 2013 |
25 May 2018 |
| Costa Rica |
25 May 2021 |
9 April 2015 |
|
15 May 2020 |
| Czech Republic |
21 December 1995 |
January 1994 |
8 June 1994 |
24 November 1995 |
| Denmark |
30 May 1961 |
|
|
|
| Estonia |
9 December 2010 |
|
16 May 2007 |
10 May 2010 |
| Finland |
28 January 1969 |
|
|
|
| France |
7 August 1961 |
|
|
|
| Germany |
27 September 1961 |
|
|
|
| Greece |
27 September 1961 |
|
|
|
| Hungary |
7 May 1996 |
December 1993 |
8 June 1994 |
|
| Iceland |
5 June 1961 |
|
|
|
| Ireland |
17 August 1961 |
|
|
|
| Israel |
7 September 2010 |
15 March 2004 |
16 May 2007 |
10 May 2010 |
| Italy |
29 March 1962 |
|
|
|
| Japan |
28 April 1964 |
November 1962 |
|
July 1963 |
| Latvia |
1 July 2016 |
|
29 May 2013 |
11 May 2016 |
| Lithuania |
5 July 2018 |
|
9 April 2015 |
31 May 2018 |
| Luxembourg |
7 December 1961 |
|
|
|
| Mexico |
18 May 1994 |
|
|
14 April 1994 |
| Netherlands |
13 November 1961 |
|
|
|
| New Zealand |
29 May 1973 |
|
|
|
| Norway |
4 July 1961 |
|
|
|
| Poland |
22 November 1996 |
1 February 1994 |
8 June 1994 |
11 July 1996 |
| Portugal |
4 August 1961 |
|
|
|
| Slovakia |
14 December 2000 |
February 1994 |
8 June 1994 |
July 2000 |
| Slovenia |
21 July 2010 |
March 1996 |
16 May 2007 |
10 May 2010 |
| South Korea |
12 December 1996 |
29 March 1995 |
|
25 October 1996 |
| Spain |
3 August 1961 |
|
|
|
| Sweden |
28 September 1961 |
|
|
|
| Switzerland |
28 September 1961 |
|
|
|
| Turkey |
2 August 1961 |
|
|
|
| United Kingdom |
2 May 1961 |
|
|
|
| United States |
12 April 1961 |
|
|
|